...Francisco Trejo; Rafael Torres Escobar Purpose The purpose of this paper is to propose a novel model, to forecast demand for a third-party service by using the Grey Systems Theory (GST) and Markov Chains, where its forecast error performance is evaluated through mean percentage error, mean...

...Yi-Chung Hu; Geng Wu; Jung-Fa Tsai Purpose Linear addition is commonly used to generate ensemble forecasts for decomposition ensemble models but traditionally treats individual modes with equal weights for simplicity. Using Taiwan air passenger flow as an empirical case, this study examines...

...Liangshuai Li; Dang Luo Purpose The damping accumulated discrete MGM(1, m) power model is proposed for the problem of forecasting the share of agricultural output value and the share of employment in China. Design/methodology/approach In this study, the damping accumulated discrete MGM(1, m...

...Shavkatjon Tulkinov Purpose Electricity plays an essential role in nations' economic development. However, coal and renewables currently play an important part in electricity production in major world economies. The current study aims to forecast the electricity production from coal and renewables...

...Che-Jung Chang; Chien-Chih Chen; Wen-Li Dai; Guiping Li Purpose The purpose of this paper is to develop a small data set forecasting method to improve the effectiveness when making managerial decisions. Design/methodology/approach In the grey modeling process, appropriate background values...

... to forecast monthly PM2.5 concentration for October to December 2018 in Beijing and provides a reference basis for the government to formulate smog control policies. Practical implications The proposed model can simulate and forecast system characteristic data with the time-lag effect more accurately...

...Chaoqing Yuan; Yuxin Zhu; Ding Chen; Sifeng Liu; Zhigeng Fang Purpose The purpose of this paper is to compare GM(1,1) model, rolling GM(1,1) model and metabolism GM(1,1) model included in the GM(1,1) model cluster and use these models to forecast global oil consumption. Design/methodology...

... estimation method and recursive function of the model are discussed. Furthermore, dummy driver setting, pre and post test methods of dummy drivers are proposed. At last, the per capita income forecasting of rural residents in Henan province of China is solved with the proposed model. Findings...

... can do the grey prediction of the next year with the new series. A total of all 364 110‐meter hurdles athletes, as the statistics provided by the ITFA. Grey prediction 110‐meter hurdles The world's pattern Liu Xiang Competitive level Sports Pattern recognition Forecasting...

...Zhensi Lin; Qishan Zhang; Hong Liu Purpose The purpose of this paper is to enhance the forecast precision of GM(1,1) model using an improved artificial fish swarm algorithm. Design/methodology/approach An optimization model of GM(1,1) model about identifying the parameters is proposed, which...

...Zheng‐Xin Wang; Yao‐Guo Dang; Shawei He Purpose The purpose of this paper is to provide a modeling approach using grey power model with first‐order one‐variable (abbreviated as GPM(1,1)) for forecasting small sample oscillating series. Design/methodology/approach An optimization method is used...

...: 1. Stability: Quick ratio. Debt ratio. Net worth to total assets. 1. Profitability: © Emerald Group Publishing Limited 2012 Grey systems Modelling Forecasting Decision making Organizations Bankruptcy Practical applications of grey models Grey incidence...

... reduction based on rough set. It is important to reduce attributes based on experts' information. Zhang Jie can be contacted at: zhulidecao@163.com © Emerald Group Publishing Limited 2012 Grey systems Modelling Forecasting Decision making Information operations Grey...

... the special form of GDGM model. Practical implications Though grey forecasting models are widely used, most of the forecasting models are based on the equal distance sequence. Due to many reasons, the raw data available usually is incomplete. There are mainly four reasons which caused non‐equidistance...

...Huayou Chen; Lei Jin; Xiang Li; Mengjie Yao Purpose The purpose of this paper is to propose the optimal combination forecasting model based on closeness degree and induced ordered weighted harmonic averaging (IOWHA) operator under the uncertain environment in which the raw data are provided...

... to add in the axiom systems of buffer operator. Findings The results are convincing that although the raw sequence suffered from certain disturbance may be enlarged or reduced, the trend is in line with the original law. All predictions must be on the premise of this trend to forecast, or prediction...

... quantitative analysis and qualitative analysis existing in pretreatment for vibration data sequences is resolved effectively. An example shows that the kind of new weakening buffer operators increase the forecast precision of data forecast model remarkably. The aim of this paper is to attempt to resolve...

...Wen‐zhan Dai; Zi‐heng Wu; Ai‐ping Yang Purpose The purpose of this paper is to solve the problem existing in the forecast of impact disturbance grey system. Design/methodology/approach Under the axiomatic system of buffer operator in grey system theory, a novel kind of buffer operators...